[antlr-interest] Calling code at rule exit

[David Ray]

Hello,

I have some code that I would like to be called whenever a rule exits 
whether it exits normally or due to an error (I'm using the default 
error handler, so reportError() is called and the exception never 
actually leaves the method). I'm maintaining a variable scope stack and 
I need to push/pop it in rules that introduce a new scope. Right now, if 
an error occurs, the pop is never called and my stack is left in a bad 
state.

If this were C++, I'd just make a sentry object and call pop in the 
destructor, but since I'm doing this in Java I'm not sure if there is a 
good way to do that.  Does anyone know of a Java equivalent to C++ 
sentry objects, or some way I can do this in ANTLR?

Thanks,
Dave Ray
ray at soartech.com